• The Journal of the Korea Contents Association
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• v.12 no.8
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• pp.37-46
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• 2012

In the existing data dissemination methods for mobile P2P networks, the search performance of content that matches the peer profile is very excellent. However, in the search for content that does not match the their profile, additional consideration about case that contents does not match the profile is needed because costs for the query processing will be incurred. To solve these problems, we propose a new data dissemination method for efficient contents search in mobile P2P networks. In the proposed method, peers determine whether they experienced communications by using a timestamp message and then perform data dissemination. We also propose a ranking algorithm to efficiently store dissemination data in a limited memory. The proposed ranking method can reduce query messages by considering the profile matches, the distribution range, and the connectivity to the data distribution peer.

• The Journal of the Korea Contents Association
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• v.9 no.10
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• pp.22-31
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• 2009

Although the amount of UCC(user created content) rapidly grows nowadays, there are various problems in authoring, distribution and management of this abundant content because the platforms for fabrication and replaying content are not compatible and the authoring environments are not sufficiently interoperable with other site or with each other. In this paper, we propose a CPMS(content publication and management system) scheme improved in interoperability to solve these problems, and we design a novel system enhancing the efficiency and speed of content distribution and management by minimizing the repetitions in the processes of production, reshaping, and publication. Moreover the proposed system adopts an improved content management technology by changing from simple point-to-point method to the centralized distribution method, and as for the service scheme, we change from the site link method to the database link method, and we also take duplex interlink scheme instead of simplex one. We finally compare the proposed system to the conventional ones as points of view of compatibility and interoperability to prove the improved performance of our system.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.10
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• pp.766-770
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• 2009

Recently, users of multimedia files demand a high capacity file via internet. However, it is difficult to guarantee QoS for high capacity files on internet because of its inconstant bandwidth. For guaranteeing the QoS, CDN (Content Delivery Network) is generally used for contents delivery service. Based on CDN, we propose Content Distribution and Management using Metadata (CDM) system which provides advanced transmission method and searching method. To enhance the transmission rate, CDM system supports segment-unit-based transmission method that enables parallel transmission. Also, we propose a distribution method through content based search.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.257-262
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• 2014

Although the amount of UCC(user created content) rapidly grows nowadays, there are various problems in authoring, distribution and management of this abundant content because the platforms for fabrication and replaying content are not compatible and the authoring environments are not sufficiently interoperable with other site or with each other. In this paper, we propose a CMS(content management system) scheme improved in interoperability to solve these problems, and we design a novel system enhancing the efficiency and speed of content distribution and management by minimizing the repetitions in the processes of production, reshaping, and publication. Moreover the proposed system adopts an improved content management technology by changing from simple point-to-point method to the centralized distribution method, and as for the service scheme, we change from the site link method to the database link method, and we also take duplex interlink scheme instead of simplex one. We finally compare the proposed system to the conventional ones as points of view of compatibility and interoperability to prove the improved performance of our system.

• Journal of Digital Contents Society
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• v.12 no.3
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• pp.309-318
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• 2011

The web trend has been flowed from portal site to user created contents site, recently. Therefore, many companies have suggested web program of producing contents for user's convenience. However, web applications that are operated in various web browsers and heterogeneous devices have many problems regarding distribution and management so far. Because of diverse one-source data formats. In this paper, we present an integrative displaying and distributing tool (IDD-Tool) for editing, distributing and managing multimedia contents and environment so that users can work. It is inspected that the tool is widely used in the fields of education, publication, corporations and etc. because a user can participates in contents producing easily in personal customized workplace with IDD-Tool and contents made by IDD-Tool are distributed.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.2021-2024
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• 2003

디지털 콘텐츠는 텍스트, 이미지, 비디오, 오디오 통의 디지털 저작물을 포함하는 총체적인 용어로 인터넷 상에서 접근할 수 있는 디지털화된 파일을 의미하는데, 최근 전자상거래의 급속한 발달과 인터넷과 같은 컴퓨터망의 확산으로 디지털 콘텐츠의 활용이 기하급수적으로 증가하고 있다. 디지털 콘텐츠는 저장, 편집, 수정이 용이할 뿐만 아니라 인터넷을 통해 원본의 손상 없이 무제한의 복제와 배포가 가능하다는 장점을 가지고 있다. 그러나, 이와 더불어 디지털 콘텐츠의 불법복제 및 배포와 같은 중요한 문제점들을 내포하고 있다. 따라서, 본 논문에서는 Key Exchange 프로토콜과 Triple DES 암호 알고리즘을 이용하여 디지털 콘텐츠 불법 복제 및 배포를 방지하기 위한 디지털 콘텐츠 보호 시스템을 구현하였다.

• Journal of Digital Contents Society
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• v.14 no.3
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• pp.357-365
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• 2013

The popularization of smart phones changes the usage patterns of mobile communication from voice-centric to data-centric communication. The demand for wireless data communications is rapidly increasing, and thus the need for expanding infrastructure for mobile communication is also rapidly increasing. In this paper, we propose a scheme for reducing the cost for the mobile communication infrastructure by exploiting opportunistic networks in dissemination of multimedia contents. By using this scheme, the large portion of the cost for mobile communication infrastructure could be saved, and the need of users for multimedia contents could be also fulfilled. Our scheme is evaluated using agent-based simulations. The simulation results show that about 70% of mobile communication can be replaced with the data communication through opportunistic networks.

• Electronics and Telecommunications Trends
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• v.20 no.4 s.94
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• pp.120-128
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• 2005

인터넷 환경이 급속도로 발전함에 따라 멀티미디어의 범람과 사용자들의 유료 콘텐츠사용에 대한 인식 부족으로 디지털 콘텐츠의 지적재산권 침해가 빈번하게 발생하고 있으며, 이러한 불법콘텐츠들의 무분별한 공유는 디지털콘텐츠 산업 발전을 저해하는 심각한 문제로 대두되고 있다. 이에 따라 최근 디지털 콘텐츠의 저작권 보호를 위해서 저작권 단속활동을 강화하고 있으며 다양한 P2P/웹하드 환경에서도 불법콘텐츠를 검색및 다운로드하고 콘텐츠를 식별하고 불법배포자를 추적할 수 있는 기술을 필요로 하게되었다. 그러나 대부분의 불법콘텐츠들은 약 80%가 P2P, 웹하드, 동호회/카페를 통해서 전파되고 있으며 각 업체별 클라이언트 프로그램의 다양성 때문에 불법콘텐츠의 검색 및 불법복제자 추적이 매우 어려운 실정이다. 불법콘텐츠의 추적 및 차단을 위해 워터마킹/핑거프린팅, 네트워크 모니터링, 매크로 프로그램, 공개 P2P 프로토콜 조작, 페이크 파일 유포 등의 기술들이 사용되고 있다. 본 고에서는 불법콘텐츠 국내외 시장현황과 업체의 기술동향을 살펴보고 불법배포자 추적을 위해 필요한 핑거프린팅과 특징점 기반 콘텐츠 식별 기술에 대해 설명한다. 그리고 P2P와 웹하드에서 불법콘텐츠들을 자동으로 다운로드하고 불법배포자들을 추적할 수 있는 시스템 아키텍처에 대하여 설명한다.

• Journal of Digital Contents Society
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• v.9 no.4
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• pp.725-733
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• 2008

CDN(Content Delivery Network) has been used as contents transmission network for transmitting high capacity contents fastly and stably. Main goals of CDN are efficient distribution and management high capacity contents. Current CDN distributes contents by managing contents based on basic metadata created by contents provider. However, existing CDN management system doesn't provide a method for applying additional metadata in content itself that is necessary for efficient contents management and distribution. Since the existing system can not annotate additional information in metadata about contents itself, and can not search contents that user wants. This paper proposes a method for applying additional metadata in existing CDN and implemented it as contents metadata management system(CMMS). A user can search needed contents effectively via CMMS. Also, the searched result can help selecting and managing contents to distribute in CDN.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.41 no.5
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• pp.99-109
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• 2004

This paper proposes a new method for tracking image contents, which are re-distributed on the Internet using a web-robot and fingerprinting scheme. The fingerprinting is an extended technique of watermarking and embeds identity of the customer into the content as a fingerprint in a way that is very difficult to erase. The fingerprint in the content can be used widely in the field of the copyright protection technique because it identifies the content itself and includes the information about the original customer. In this paper we discuss an active image tracking system using a web-robot and fingerprinting scheme. In the proposed system the information of the original customer is embedded as a fingerprint into the image content before distribution and also stored into DB. The distributed contents are collected by the web-robot and fingerprinting information is extracted from the contents. Finally the identifying of contents is done by comparing the extracted fingerprint with the selling history of the content.